a quality that makes one person, animal, or thing different from another.

differences in traits among individuals within a population.

A physical feature or behavior that helps an organism survive in its environment.

characteristic an organism develops during its lifetime; not inherited

Survival of the Fittest

organisms best suited to their environment are more likely to survive and reproduce.

Organisms that are better suited for their environment are more likely to survive and reproduce.

the ability of an organism to survive and pass on its genes to the next generation.

the change in the characteristics of a species over several generations.

the study of similarities and differences in the body structures of different organisms.

Geographic Distribution

where different organisms are found around the world.

the study of how living things develop from a fertilized egg into a fully formed organism.

body part that no longer has an important function.

Homologous Structures

body parts in different organisms that are similar because they come from a common ancestor.

how often a specific allele appears in a population.

Punctuated Equilibrum

the idea that evolution happens in short, rapid bursts, with long periods of little change in between.

the idea that evolution happens slowly over a long time.

when two related species become more different over time.

when unrelated species develop similar traits because they live in similar environments.

when two species evolve in response to each other.

a change in a population’s genes due to chance, NOT natural selection.

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Evolution Vocabulary

Unit 6

Question	Answer
Trait	a quality that makes one person, animal, or thing different from another.
Variation	differences in traits among individuals within a population.
Adaptation	A physical feature or behavior that helps an organism survive in its environment.
Acquired Trait	characteristic an organism develops during its lifetime; not inherited
Survival of the Fittest	organisms best suited to their environment are more likely to survive and reproduce.
Natural Selection	Organisms that are better suited for their environment are more likely to survive and reproduce.
Fitness	the ability of an organism to survive and pass on its genes to the next generation.
Evolution	the change in the characteristics of a species over several generations.
Comparative Anatomy	the study of similarities and differences in the body structures of different organisms.
Geographic Distribution	where different organisms are found around the world.
Embryology	the study of how living things develop from a fertilized egg into a fully formed organism.
Vestigial Organ	body part that no longer has an important function.
Homologous Structures	body parts in different organisms that are similar because they come from a common ancestor.
Gene Pool	all the genes in a population.
Allele Frequency	how often a specific allele appears in a population.
Punctuated Equilibrum	the idea that evolution happens in short, rapid bursts, with long periods of little change in between.
Gradualism	the idea that evolution happens slowly over a long time.
Divergent Evolution	when two related species become more different over time.
Convergent Evolution	when unrelated species develop similar traits because they live in similar environments.
Co-evolution	when two species evolve in response to each other.
Genetic Drift	a change in a population’s genes due to chance, NOT natural selection.

Created by: user-1964461

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